Improvement in burglar-alarm



PIERSONL MANVILLE. l y Burglar Alarm;

' Patented 1an. 12, 1889.

WWU

M. PIRSON kAND M. D. YMANVILLE, OF ADAMS, NEW YORK.

Letters Patent No. 85,848, lated January 12, 1869.

The Schedule referred to in these Letters Patent and making part of the same.

To 'all whom 'it may concern Be it known that we, M. PIERSOX and M. D. MA- VILLE, of Adams, in the county of Jeerson, and State of New York, have invented a new and useful Improvement in a Burglar-Alarm; and we do hereby declare that the following is a full, clear, and exact dev scription thereof, which will ena-ble others skilled in the art to make and use the same, reference heilig had to tlle accolnpanying drawings, forming part of this specification, in which the ligure is a side view of our improved instrument, partly in section, to show the construction.

vSimilar letters of reference indicate like parts.

Our invention has for its object to furnish an improved alarm for attachment to doors, windows, drawers, Sto., which shall be so constructed and z'nranged that it shall be impossible to open the door, window, or drawer, to which it is attached, without a continuous ringing of the alarm.

It consists in the construction and combination of the various parts, hereinafter more fully described.

A is a small metallic wheel, about an inch in diameter, whichis made with a narrow flange upon each side, to keep the rubber band or tire, with which it is provided, in place upon its face.

The wheel A is made with a ratchet-wheel or escapefpins, B, upon one side, is pivoted to the support or frame C, and is revolved by friction against some `suitable surface, adjacent to the door, window, or

drawer, to which it is attached.

D is a lever, pivoted to lugs formed upon the forward side of the base-plate. of the frame C, by a short shaft, around which is coiled a wire spring, E, by the action of which the said leveris held forward in such a position as to rest upon the ratchet-wheel or escape-pins B.

To the rear end of the level' D is attached the rod or stem ofthe hammer F, by which the bell is struck to sound the alarm.

G is a bell, which is supported kby an arm, H, the end of which is inserted in a socket formed in or attached to the frame C, so that the said bell may be conveniently detached when desired.

.The lever. hammer, and bell are so .arranged that,-

as the end of the lever drops from each ratchet-tooth or escape-pin, the hammer may strike the bell.

Upon the under side of the base-plate of the frame C are formed ears, through which is passed a short shaft, having a wire spring, I, coiled around it for the purpose of holding the wheel A firmly against the ii'iction-surhce, and for holding up the plate G, and the mechanism attached thereto, in the proper position for operation.

The device may be secured to the door, window, or drawer, bypassing the projecting ends of the shaft, last mentioned, through ears attached to said door, window, or drawer, as shown in red in the figure.

'lhe wheel A may be drawn and held away from the li'iction-surface, by means of a cord attached to the end of the base-plate ofthe frame C most distant from the wheel A.

The device, when applied to doors, is placed upon the upper part of the door, the wheel A working against a short iron arm, curved to correspondwith the swing ofthe door, land attached to the door-frame.

When applied to windows, it should be attached to the lower sash, the wheel A rolling along the upper sash as the said lower sash is raised.

Then applied to drawers, it is placed inside of the drawer, with the wheel A resting against some suitable iction-suricc. In this case a spring should be connected with it, so that it may be made to operate or not, at the will of the operator.

Having thus described our invention,

XVe claim as new, and desire tosccure by Letters Patentl. The combination ofthe friction-wheel A, constructed as described, escape-pins B, or equivalent, lever D, hammer F, and spring E, with each other, with the bell G, and with the frame C, substantially as herein shown and described, and for the purpose set forth.

2. The spring I, arranged upon the short shaft of the plate C, in combination with said plate, the bell G,ham1ncr F, and wheel A, whereby the bell is held up in the proper position for operation, as herein shown and described.

M. PIERSON.

M. D. MAN VILLE. Witnesses:

T. Cf-CHLTTENDEN, G. G. BRAGDON. 

